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High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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Jan16-12 Greg Bernhardt
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
ChrisVer
187 61,757
rules Sticky Thread Pinned: Forum Rules
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:41 AM
ZapperZ
1 25,757
Take a look at the attachment, my question is obvious from the colored points. The attachment is from:...
Aug4-14 11:14 PM
Greg Bernhardt
1 512
I am not well versed in the idea of Higgs mechanism. However, I was wondering if it does explain the problem of...
Aug2-14 10:50 PM
Einj
5 550
I was reading about Fermilab moving their new storage ring to the Muon Campus for the Muon g-2 experiment. I was...
Aug2-14 05:28 PM
Vanadium 50
6 429
Why is there seemingly so little interest among particle physicists about discovering the graviton? Is it because it...
Aug2-14 03:10 PM
mfb
4 492
I would like to ask when can someone add the width in a scalar particle's propagator. In general the scalar propagator...
Aug1-14 01:31 PM
The_Duck
8 459
Hi, I recently attended several lectures on the topic of neutrino astrophysics. I wanted to verify some of the fact...
Aug1-14 11:56 AM
Matterwave
4 495
I was wondering if someone could explain to me how you determine how a Baryon/Meson decays, meaning Strong decay, Weak...
Aug1-14 08:49 AM
ChrisVer
13 474
The uuu hadron doesn't violate Pauli's exclusion principle presumably because there is color. But even without...
Aug1-14 04:59 AM
Orodruin
12 447
Hi all, I try to find the detailed calculations of the couplings of sfermions to the lightest h Higgs boson in...
Aug1-14 12:25 AM
Safinaz
2 396
When the Z boson is around can a neutrino interact with a particle other than an electron? And how does the neutrino...
Jul31-14 03:30 PM
mfb
22 851
Of the 61 known elementary or fundamental particles, which ones exist in the everyday, "natural" world of the Earth,...
Jul30-14 03:23 PM
ChrisVer
2 365
Hi guys, I have a question about symmetry breaking in Susy, I hope it won't be so naive that I just started to...
Jul30-14 03:02 PM
ChrisVer
3 332
Binding energy is typically used to talk about the amount of energy needed to separate bound particles. This means...
Jul30-14 02:41 PM
mfb
12 591
i searched Steven weinberg in google scholar. it returns many articles but "a model of leptons" why does "a model of...
Jul29-14 02:11 PM
Greg Bernhardt
1 576
Three questions, In a femtosecond laser, or any laser for that matter, how is a pulse generated from noise? how do...
Jul29-14 02:11 PM
Greg Bernhardt
1 853
Hello! I'm not entirely sure this is very "scientific", but I have an idea that I would like some feedback on. I...
Jul29-14 01:12 AM
Whyisthat21
3 780
So I've been researching Dense Plasma Focus devices for a while now and a question just occured to me. Since the fill...
Jul28-14 10:31 PM
Warpspeed13
2 1,199
I would like to ask, to make it clearer to me, what does chirality means? and how can someone see whether his theory...
Jul28-14 05:01 PM
Greg Bernhardt
1 1,312
What's the difference between a neutrino and a Muon? Will a neutrino induce fusion the same as a muon? Does muon...
Jul28-14 07:42 AM
Orodruin
7 491
I am trying to derive the algebra and I get a factor of 2 wrong... Consider the Lorentz group elements near the...
Jul27-14 02:40 PM
samalkhaiat
9 1,119
The action for Yang-Mill's theory is often written as $$ S= \int \frac{1}{4}\text{Tr} (F^{\mu \nu} F_{\mu \nu})d^4 x...
Jul27-14 02:12 PM
samalkhaiat
2 467
I have three questions about ICF, in the explanations i have read on the internet about ICF they all explain that the...
Jul27-14 10:50 AM
the_wolfman
1 540
http://en.wikipedia.org/wiki/Inelastic_collision An inelastic collision, in contrast to an elastic collision, is a...
Jul27-14 08:27 AM
Vanadium 50
2 432
A charged lepton can absorb a W+ boson and be converted into a neutrino, and visa versa. The neutrino has such small...
Jul25-14 08:39 PM
ChrisVer
4 861
Hey everyone i'm new here and this is my first thread, although i have great interest in chemistry and physics my...
Jul25-14 06:53 PM
mfb
2 641
So I've done some research, but to no avail. Can anyone link me to some reasonably detailed information regarding the...
Jul25-14 06:36 PM
mfb
6 1,017
I understand that, for example, a thick enough sheet of lead can absorb gamma radiation, but I want to understand what...
Jul20-14 05:42 PM
mathman
1 1,021
https://lh4.googleusercontent.com/-MODAPtaDFhY/U8utJMbxycI/AAAAAAAAWcQ/TtLYdzqeoLM/w266-h259-no/IMG_20140720_075036.jpg...
Jul20-14 09:50 AM
anorlunda
2 919
I am new to QFT and found myself wondering the following. Particle physics experiments usually consist of looking at...
Jul20-14 04:57 AM
DarMM
7 2,988
I read some of the articles related to particle physics experiment and don't know the meaning of it. 1. minimum...
Jul19-14 04:50 PM
mfb
3 1,128
I had an argument at my university about it, since experiments at LHC aren't 100% confirmed. I mean, gauge theories...
Jul19-14 04:14 PM
tahlaskerssen
9 1,220
Hi all! I am not sure how to prove mathematically that the expression for the probability that a neutrino...
Jul18-14 08:50 AM
Trifis
7 2,548
When a proton collides with a proton say at the LHC, is vacuum field theory used? It seems like you shouldn't have to...
Jul17-14 04:48 PM
mfb
4 2,014
I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed...
Jul16-14 04:59 PM
phinds
7 2,815
In a comment http://motls.blogspot.com.es/2014/07/cms-sees-650-gev-leptoquarks.html#comment-1479399237 to Motl's blog,...
Jul16-14 07:11 AM
arivero
5 1,835
Hi. on page 95 , I am not sure how did he derive the second term on the RHS of equation (13.16). ...
Jul15-14 11:36 AM
MathematicalPhysicist
4 1,597
If one has a 4-fermion vertex, like in Fermi theory : ##G_f (f_1 \Gamma f_2)(l_1 \Gamma l_2)## And you are...
Jul15-14 08:39 AM
Hepth
2 1,470
Since plants contain proteins that help them identify gravity in order to grow the right way, and they also contain...
Jul14-14 04:13 PM
Ryan_m_b
13 2,430
I was curious as to the difference in free neutron decay and the lack of decay when bound in a nucleus. I found the...
Jul14-14 03:53 PM
mfb
5 1,920
Greetings to all I had some problems using MCNP5 for gamma shielding calculation. The original input file is from a...
Jul14-14 02:11 PM
salmankhan
14 4,526

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